Bfm #72 To Bfm #75: Alarm Mode Setting - Mitsubishi Electric MELSEC FX2N-2LC User Manual

FX2N-2LC Temperature Control Block
7.2.34

BFM #72 to BFM #75: Alarm mode setting

The FX -2LC is equipped with 14 types of alarms. Among them, up to 4 types can be used in
2N
accordance with the application.
Write the alarm No. used in Alarm 1 to BFM #72.
Write the alarm No. used in Alarm 2 to BFM #73.
Write the alarm No. used in Alarm 3 to BFM #74.
Write the alarm No. used in Alarm 4 to BFM #75.
The alarm modes set here are applied to both channels.
However, the set value of each alarm can be set for each channel, and the alarm result can be
obtained for each channel also.
(CH1 set value: BFM #13 to BFM #16, CH2 set value: BFM #22 to BFM #25
CH1 alarm result: BFM #1 b4 to b8, CH2 alarm result: BFM #2 b4 to b8)
Or a same alarm type can be set to two or more BFM Nos.
The initial value is "0 (alarm function OFF)". For the details, refer to Section 6.
Table 7.8:
Alarm
No.
0 Alarm function OFF
1 Upper limit input value alarm
2 Lower limit input value alarm
3 Upper limit deviation alarm
4 Lower limit deviation alarm
5 Upper/lower limit deviation
6 Range alarm
Upper limit input value alarm
7
with wait
Lower limit input value alarm
8
with wait
Upper limit deviation value
9
alarm with wait
Lower limit deviation value
10
alarm with wait
Alarm type
Alarm function is disabled.
When measured value (PV) is more than alarm set
value, an alarm is issued.
When measured value (PV) is less than alarm set
value, an alarm is issued.
When deviation (= Measured value (PV) - Set
value (SV)) is more than alarm set value, an alarm
is issued.
When deviation (= Measured value (PV) - Set
value (SV)) is less than alarm set value, an alarm
is issued.
When absolute deviation (=  Measured value (PV)
- Set value (SV)  ) is more than alarm set value, an
alarm is issued.
When absolute deviation (=  Measured value (PV)
- Set value (SV)  ) is less than alarm set value, an
alarm is issued.
When measured value (PV) is more than alarm set
value, an alarm is issued. However, when power is
turned on, measured value is ignored.
When measured value (PV) is less than alarm set
value, an alarm is issued. However, when power is
turned on, measured value is ignored.
When deviation (= Measured value (PV) - Set
value (SV)) is more than alarm set value, an alarm
is issued. However, when power is turned on,
measured value is ignored.
When deviation (= Measured value (PV) - Set
value (SV)) is less than alarm set value, an alarm
is issued. However, when power is turned on,
measured value ignored.
Buffer Memory (BFM) 7
Description
Set
range
---
Input
range
Input
range
7
±Input
width
±Input
width
+Input
width
+Input
width
Input
range
Input
range
±Input
width
±Input
width
7-23